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Sagot :
Chlorine's electron arrangement is 1s2 2s2 2p6 3s2 3p5. We may infer from the element's electrical configuration that it is in the 14th group and third period of the periodic table and is a member of the p-block.
15 protons hence equal 15 electrons if it's an atom. As a result, we're adding up to 15. The numbers are 1S2, 2S2, 2P6, and 3S2, 3P3. Copper's (Co) electron configuration is 1s2 2s2 2p6 3s3 3p6 4s2 3d7. By designating Copper by the greatest energy subshell that has any electrons, a chemist would abbreviate this notation to merely "3d7." You won't get the best understanding of an atom's structure via orbital classification alone.
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